package string;


class Main {
    final Integer a;

    public Main(Integer a) {
        this.a = a;

    }



    public static void main(String[] args) {
         String s = String.valueOf(124);
         System.out.println(s);
         System.out.println(String.valueOf(new Boolean(true)));
         System.out.printf("%d \\\n",5);
         System.out.println("-1234".matches("-?\\d+"));


     }


}
